Aqua is a Danish dance-pop group, best known for their 1997 breakthrough single "Barbie Girl". The group formed in 1989 and achieved huge success across the globe in the late 1990s and early 2000s. The group managed to top the UK Singles Chart with their first three singles. The group released two albums: ''Aquarium'' in 1997 and ''Aquarius'' in 2000, before splitting up in July 2001. The group sold an estimated 33 million albums and singles, making them the most successful Danish band ever.

In their prime, Aqua's singles managed to chart top ten in a number of countries where European pop acts would not normally succeed, including the United States, Australia, and Japan. The group also caused controversy with the double entendres in their "Barbie Girl" single, with the Barbie doll makers Creator/{{Mattel}} filing a lawsuit against the group (or rather their American record label, EMI). The lawsuit was finally dismissed in the Ninth Circuit Court of Appeals in 2002; the opinion, written by Judge [[CoolOldGuy Alex Kozinski]], ruled "[[SophisticatedAsHell The parties are advised]] [[BuffySpeak to chill.]]"

The band's members are vocalists Lene Nystrøm and Rene Dif, guitarist Søren Rasted, and keyboardist Claus Norreen. During their split, Nystrøm, Dif and Rasted have all achieved solo chart success, and Norreen has continued in the music industry remixing other artists' material.

At a press event on Friday, October 26, 2007, the group announced a reunion tour, as well as the release of a compilation album featuring new material. In December 2008, it was announced Aqua would have three concerts in 2009.

And in 2011 they recorded their new album ''Megalomania'' with a change in sound and in attitude.
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!!This band provides examples of:
* BigDamnHeroes: Rene as Dr. Jones in "Dr. Jones", the robot C.A.N.D.Y. in "Lollipop (Candyman)" video.
* ChristmasSongs: "Spin Me A Christmas".
* ClusterFBomb: Quite a few tracks from ''Megalomania''.
* ConceptVideo: A few, including the videos for "Cartoon Heroes", "Lollipop (Candyman)", "Doctor Jones" and "We Belong to the Sea".
* DamselInDistress: Lene in the "My Oh My" video (before going DamselOutOfDistress on her captors). In "Doctor Jones", she [[CapturedByCannibals ends up in a cannibal's pot]] and in "Lollipop (Candyman)" she is captured by aliens; in the latter two, she shares her distress with her [[DistressedDude male companions]].
* DarkerAndEdgier: Megalomania, again.
* DrivesLikeCrazy: "How R U Doin" video. Okay, they are miniature cars, but toppling mini electrical poles and back-flipping midair is still pretty crazy.
* GenreThrowback:
** "Back To The 80's" is a GenreThrowback to the music and music videos of TheEighties.
** "Halloween" is an {{Homage}} to the SlasherMovie genre, complete with [[HellIsThatNoise creepy killer breathing]], HarassingPhoneCall [[TheCallsAreComingFromInsideTheHouse Coming from Inside the House]], EvilLaugh, StockSoundEffects of DramaticThunder, and eerie, ominous music (including [[StandardSnippet a brief snippet of]] [[OminousPipeOrgan organ music]] [[StandardSnippet playing chords from Bach's Toccata and Fugue]], or a sound-alike). Toes the line between AffectionateParody and NightmareFuel.
* GratuitousJapanese: The opening of the "Barbie Girl" video. They have never used this trope since.
* HotterAndSexier: Any subtext from their previous songs has pretty much become, well, text as of ''Megalomania''.
* JustLikeRobinHood: Rene's lines in "My Oh My". ''"Gotta steal from the rich ... Gotta give to the poor."''
* KaleidoscopeHair: Lene wore no fewer than four wigs for "Lollipop (Candyman)"
* MoodWhiplash: Each of their albums contains at least one song which is more serious than the rest, such as "Turn Back Time" and "Aquarius". "My Mamma Said" takes the cake as, despite its fast pace and its unassuming title, it talks about ''death''.
* MsFanservice: From her sexy AdventurerOutfit in the "Doctor Jones" music video to the extreme close up of her behind putting on jeans in the "We Belong To The Sea" music video, Lene fits this trope pretty well.
* MulticoloredHair: During "Aquarium" era, Lene had the front part of her hair dyed red while the rest was black.
* MythologyGag:
** "Back to the 80's" mentions Barbie.
** "Halloween" mentions the Candyman from "Lollipop (Candyman)".
* {{Pirate}}: "My oh My" video.
* PointyEars: Candyman (Rene) in the "Lollipop (Candyman)" music video.
* RaygunGothic: The "Lollipop (Candyman)" music video.
* ScreamingWoman: Lene does this at the end of "Halloween", an example that is especially effective and chilling.
* SelfParody: "Bumble Bees" video.
* ShoutOut: Plenty. "[[ExactlyWhatItSaysOnTheTin Barbie Girl]]" is half ShoutOut, half TakeThat to {{Franchise/Barbie}}, "Doctor Jones" is a ShoutOut to ''IndianaJones'', "Cartoon Heroes" references {{Superhero}} comics among other things, and "[[ExactlyWhatItSaysOnTheTin Back to the 80's]]" is full of {{Shout Out}}s to pop culture from TheEighties, such as Music/MichaelJackson, Creator/MrT, and {{MTV}}.
* SopranoAndGravel
* SteamPunk: The [[CoolStarship spaceship]] in the "Cartoon Heroes" music video.
* AWildRapperAppears: "Good Morning Sunshine".
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